Sash-balance.



E. SCHOENHEIT.

SASH BALANCE;

APPLICATION FILED MAR.6, 1914.

1,102,444. Patented July 7, 1914.

W/ T/VEJSE 5 lNl/E/VTO R Maw j 7 4444 a ATTK THE NORI QIS PETERS (20., PHDTD-LI'I'HQ. WASHINGTON, D C.

ERNEST SGI-IOENHEIT, 01E AMBBIIDGE, PENNSYLVANIA.

SASH-BALANCE.

Specification of Letters Patent.

Patented July '7, 1914.

Application filed. March 6, 1914. Serial No. 822,866.

To all whom it may concern:

Be it known that I, ERNEST SononNHErr, a citizen of the 'United States, residing at Ambridge, in the county of Beaver and State of Pennsylvania, have invented cer tain new and useful Improvements in Sash- Balances, of which the following is a specification.

This invention relates to improvements in sash balances and its object is to provide sash balances in which the lower sash is pro vided with a bearing in which is disposed a lug adapted to travel in the grooved periphery of a rotary shaft disposed in the hollow portion of the casing and which shaft at it upper extremity carries a rotary disk which is grooved to permit frictional engagementwith a flexible member terminally supported by an angular bracket secured to the inner wall of the casing; the purpose of the flexible member in engagement with said disk being to resist descent of the window, through force of gravity, from an adjusted position.

With the foregoing and other objects in view the invention consists in the combina tion and arrangement of parts to be hereinafter fully described in the following specification, pointed out in the claims and illustrated in the accompanying drawing which forms a part of the said specification and in which Figure 1 is a view of the upper portion of the rotary shaft that permits movement of the lower window sashand of the rotary disk secured thereto showing an end view of the flexible'element and a side view of the supporting bracket, all disposed within the window casing. Fig. 2 is a front view of Fig. 1. Fig. 3 is a plan of the same. Fig. 1 is a front elevation of a portion of window, casing shown in section, constructed in accordance with my invention. Fig. 5 is a section taken on line 55 of Fig. 4.

Like reference characters indicate corresponding parts throughout the several views.

The reference numeral 1 indicates the upper sash, 2 the lower sash and 3 the casing of the window. One wall of the casing is slotted vertically to permit vertical movement of a bearing 4 that is secured to the lower window sash and projected into the hollow casing and that is apertured to encircle a rotary shaft 5 formed with a spiral groove 6 in which groove 2. lug 7 carried by said bearing 4 rides. The lower end of the rotary shaft 5 is disposed in a bearing 8 secured to the inner wall of the casing andthe upper end of said shaft is disposed in a socket 9 of a bracket 10, upon ball bearings 11, secured to the inner wall of the casing.

To the upper end of the shaft 5 adjacent the bracket 10 a rotary disk 12 is secured by a pin 13 and said disk is formed with an annular groove 14 and with anangular groove 15 thus forming an intermediate ridge 16 terminating in a point and a marginal ridge l7 terminating in a point. The bracket 10 aforesaid is formed with oppositelty digsposed depending angular arms 18, 19, the former being a greater length than the latter and each of'said arms being terminally provided with screws 20 which are engaged by the elongated termnial eyes 21, 21 of a flexible member 22 which is adapted to ride in either of the grooves of said disk or to be disposed below said grooves.

Operation: When the lower sash 2 is raised the lug 7 will rotate the shaft 5 and with it the disk 12. The spring 22 partly lying in the grooved portion 14 of the disk 12 will be forced out into the grooved portion 15 and finally out of the same into the position shown dotted at 23 in Fig. 2 in which position it will remain as long as the window sash is forced up. lVhen pressure in an upward direction is removed from this sash gravity will cause it to rotate the shaft 5 until the point of the ridge 17 which is disposed below the center line of the spring in dotted position 23, will engage said spring and force it into the groove 15 also shown dotted in Fig. 2, which is the normal position of the spring, when the friction between said spring and disk 12 will be sufiicient to lock the descent of the window.

When it is desired to lower the sash the same is done in the usual manner causing rotation of the disk 12 to force the spring into groove 14 in which position it is shown in full lines in Fig. 2 which position said spring will occupy until the window sash 2 is started up again.

What is claimed is 1. In a sash balance, an apertured casing, bearings secured to the inner wall of same, one of said bearings being formed with oppositely disposed depending arms, a spirally grooved rotary shaft disposed in sald bearings, a bearing secured to the lower window sash and projected into the caslng and en circling said shaft, a lug carried by said bearing riding in the grooved portion of said shaft, a disk secured to one end of said shaft and formed with an annular groove and with an angular groove and a flexible member, formed with elongated terminal eyes secured to the arms of one of said bearings and adapted to removably. ride in the grooved portions of said disk.

' 2. In a sash balance, an apertured casing, bearings secured to the inner wall of the same, one of said bearings being formed with oppositely disposed depending arms,

sash and projected into the casing and ennesses. screws carried by said arms, a spirally grooved rotary shaft disposed in said bearings, a bearing secured to the lower Window circling said shaft, a lug carried by said bearing riding in the grooved portion of said shaft, a disk secured to'one end of said shaft and formed with an annular and with an angular groove and means associated with the aforesaid screws and with said disk capa ble of bearing upon either of the grooved portions of the latter member to yieldingly prevent rotation of the same. i t

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two subscribing wit- 7 ERNEST SCHOENHEIT. Witnesses: Y

J OHN Lnnwie, LUDWIG GRUBER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. i 

